ffprobe inputVideo.avi -hide_banner -show_entries frame=coded_picture_number,best_effort_timestamp_time -read_intervals 5%+10 -of json -read_intervals 5%+10 starts at 5 seconds and continues for further 10 seconds. -read_intervals 5%10 ends at 10 seconds. Seeking, however, is not accurate. coded_picture_number will tell you the encoding order.

The unix time stamp is a way to track time as a running total of seconds. This count starts at the Unix Epoch on January 1st, 1970 at UTC. Therefore, the unix time stamp is merely the number of seconds between a particular date and the Unix Epoch. ffprobe.exe . This report is generated from a file or URL submitted to this webservice on August 19th 2020 06:01:59 (UTC) and action script Heavy Anti-Evasion Guest System: Windows 7 32 bit, Professional, 6.1 (build 7601), Service Pack 1 The select filter selects frames to pass in output. The constant of the filter is “pict_type” and the value “PICT_TYPE_I”. In short, we are only passing key frames to the output.-vsync 2 prevents ffmpeg to generate more than one copy for each key frame.-f image2 writes video frames to image files.

ffprobe -show_frames -i video.ext (checkout the help for a load of other stuff too). Decoder, Output description, Current frame, Frame timestamps, Raw frame timestamps, Frame type, Input bitrate, Coded frame size, Frame mean quantizer, Accurate deblocking.

In order to encode frame B 1, the encoder needs both frames P 1 and P 2 as B 1 is a predicated frame based on the contents of the past frame P 1 and the future frame P 2. Thus the stream order will be I 1 P 1 P 2 B 1 .

Frame can be written to flash memory instead of RAM, however this will affect the frame rate. You can always request whatever frame rate you want, upon inspecting the timestamps.csv file, you'll note that the actual timestamps of each frame won't be consistent with the frame rate you requested if the Raspberry Pi isn't able to keep up.